Adjustable secondary rack



W. F. BRADY ADJUSTABLE SECONDARY RACK Aug. 12 1924.

Filed Sept. 22 1923 .Bzaafy B #& ATTORNEX INVENTOR Patented Aug. 12,1924.

UNITED STATES WILLIAM I. BRADY, OF NEW BRITAIN, CONNECTICUT.

ADJUSTABLE SECONDARY RACK.

Application filed September 22, 1923.

T0 aZZ whom it may concern:

Be it known that I, WILLIAM F. BRADY, a citizen of the United States,and a resident of New Britain, county of Hartford, and State ofConnecticut, have invented certain new and useful Improvements inAdjustable Secondary Racks, of which the following is a specification.

This invention relates to secondary racks for electrical power systems,and more particularly to a secondary rack having an adjustable insulatoradapted to be moved along the rack to any desired position.

One object of'the invention is to provide a secondary rack of the abovenature comprising a U-shaped supporting member in which are mounted aninsulator-holding rod and a second rod for reinforcing and strengtheningsaid insulator-holding rod.

A further object is to provide an adjustable insulator especiallyadapted to be jointly mounted on the supporting rod and the reinforcingrod.

A further object of the invention is to provide a device of the abovenature which will be simple, cheap to manufacture, easy to install,compact in size, and very efficient and durable in use.

With these and other objects in view, there have been illustrated on theaccompanying drawings several forms in which the invention may beconveniently embodied in practice.

Fig. 1 represents a perspective view, with certain parts shown insection, of one form of the invention in which the secondary rack isprovided with a single adjustable insulator.

Fig. 2 is a perspective view of a second form of the invention in whichthe rack is provided with a pair of adjustable insulators and anintermediate strengthening rod.

Fig. is a perspective view of a third form of the invention in which therack has a single adjustable insulator and an intermediate strengtheningrod, and in which the rack is adapted to be secured to a cross arm,wall, or other surface by a plurality of angle brackets.

Fig. 4 is a perspective view, on a considerably reduced scale, of a poleand cross arms showing a secondary rack of the first form mounted upon across arm.

SeriaI No. 664,219.

In electrical power lines for transmitting current from a centralstation to the points of consumption, it has become customary to employconductors known as secondary wires to carry current at a voltage ofabout 2300. In order to prevent arcing and short circuiting betweenadjacent conductors, which would otherwise be likely to occur on accountof the high voltage, it is generally required by statute in most statesthat the conductors shall be spaced apart by a specified distance. Ithas been found difficult in practice, however, to always arrange thewires at the specified intervals due to the fact that the rackssupporting the wires are usually secured to the cross arm or polepermantently, and said racks have no provision for changing the positionof the insulators carried thereon.

By means of the present invention, the above and other disadvantageshave been avoided by so constructing the secondary rack as to permit oneor more of the insulators to be readily moved along the rack to anydesired position.

Referring now to the drawings in which like reference numerals denotecorrespond ing parts throughout the several views, the first form of theinvention shown in Figs. 1 and t comprises a U-shaped supporting memberor clevis having a base 10 and a pair of upstanding arms 11 and 12arranged at right angles to the base. The base 10 is provided near itsends with a pair of elongated slots 13 and 1 1 by means of which it maybe secured to a pole, wall, or cross arm, as by bolts and nuts. The arms11 and 12 are preferably semi-cylindrical at their free ends 15 and 16and are provided with circular apertures 17 and 18 concentric with saidends for receiving an insulator supporting rod 19 which preferablyextends for a short distance beyond the arms 11 and 12 for a purpose tobe hereinafter described.

The supporting rod 19 is threaded preferably though not necessarilythroughout its length, as clearly shown in Fig. 1, and is provided atits opposite ends with a wing head 20 and an aperture 21 respectivelytheaperture 21 being adapted to receive a cotter pin 22. Between the arms11 and 12 is mounted an adjustable hollow insulator spool 23 of anyusual construction, said spool being secured in position at any desiredpoint on the supporting rod by means of two pairs of nuts 24 and 25located at either side of said spool. On the ends of the supporting rodbeyond the arms 11 and 12 a pair of fixed insulator spools 26 and 27 areprovided, said spools being identical in all respects with the spool 23.Washers 28 and 29 are provided outside of said spools 26 and 27, and alocking nut 29 is mounted between the washer 28 and the cotter pin 22.

Fig. 2 illustrates a second form of the in vention in which the rack hasa U-shaped supporting member 30 similar to the U-shaped member 10 of thefirst form of rack. In this instance, however, the slots in the base ofthe supporting member have been omitted. The base of the supportingmember 30 is adapted to be secured to a pole, wall, or cross arm bymeans of a pair of transverse clamping strips 31 and Each of the strips31 and 32 is arched to fit over the base of the support with itsextremities flush therewith, and said strips are secured to said baseand the pole, wall or cross arm, in any suitable manner as by means ofscrews, not shown, passing through screw holes 33 and 34. The upstandingarms of the support 30 are designated by the nu merals 35 and 36 and areprovided with apertures 37 and 38 near the top and bottom of said armsrespectively. The top apertures 37 are preferably tapped to en gage athreaded supporting rod 39, as clear- 1y shown in Fig. 2. The bottomapertures 38 are square in shape to receive the square intermediate rod40 which is provided between the supporting rod 39 and the base toincrease the rigidity of the rack and to reinforce and strengthen thesupporting rod 39. The rod 39 is provided with a wing head 41 on one endand is locked in position by a nut 42 and a cotter pin 3 at the otherend thereof. The square intermediate rod 40 is similarly provided atoneend with a square head 4A and is locked in place by a nut 45 and acotter pin 16 at its other end. i

In the embodiment of the invention illustrated in Fig. 2, the rack isprovided between the arms of the supporting member 30 with a pair ofinsulator spools 17 and 48, said spools being preferably though notnecessarily threaded on their interior to engage the threads of the rod39. The lefthand spool 47, as viewed in Fig. 2, is held in place betweena pair of depending strips 49 and 50 by two sets of locking nuts 51 and52 respectively, the lower ends of the strips 19 and 50 being providedwith square holes 53 and 54 adapted to fit upon the intermediatereinforcing rod 1O. The righthand spool 48 is located within a clevis 55having its arms 56 and 57 in contact with the end faces thereof. Thearms 56 and 57 are also provided with square holes to fit over thesquare rod 40. Two pairs of locking nuts 58 and 59 are provided, as withthe left hand spool, to hold the spool 18 in any desired adjustedposition. It will thus be seen that the insulator spools 4:9 and 50 arenot only supported against horizontal stresses, but are stronglyreinforced against downward stresses by means of the intermediate rod10.

A still further modified form of the invention is illustrated in Fig. 3.In this form of rack, the U-shaped supporting member is omitted and therack is secured in place upon the pole, wall, or cross arm by means ofthree angle-shaped brackets 60, 61, 62, the upstanding arms of which areprovided with apertures 63 and 64?, to receive a threaded upper rod 65and a smooth lower rod 66 respectively. The threaded upper rod 65 isprovided outside of the bracket with a head 67, and is locked in placeby means of a nut 68 and a cotter pin 69 outside of the bracket 62. Thesmooth lower rod 66 is similarly provided outside the bracket 60 with awing head 70, and is similarly locked in place at its other end by a nut71 and cotter pin 72. The brackets 60 and 61 are of uniform widththroughout and are provided at their base portions with screw holes 73and 74 respectively, said screw holes being adapted to receive theextremities of a U-shaped clamping rod 75 which is employed when thedevice is to be secured upon a cross arm 76. \Vhen it is desired toattach the rack to a wall or pole, all three of the angle brackets willbe employed. In this case the bases of the brackets will be secured tothe surface of the wall or pole in any suitable manner as by screws, notshown. As will be clear from the drawing, the angle bracket 61 isslidable along the rods and 66 so that various sizes of U-shaped clampsand cross arms may be accommodated.

In the third form of secondary rack, provision is made of a special typeof insulator comprising a pair of approximately rectangular grooved endsections 77 and 78 which are joined by a rectangular central section 79as clearly shown in Fig. 3. This form of insulator is also provided witha pair of longitudinal spaced apertures for re ceiving the rods 65 and66. The insulator is also provided with a somewhat larger centraltransverse aperture 82 for receiving an vention is not to be limited tothe specific disclosures, but may be modified and embodied in variousother forms without departing from its spirit. In short, the inventionincludes all the modifications and embodiments coming within the scopeof the following claim.

Having thus fully described the invention, what is claimed as new, andfor which it is desired to secure Letters Patent, is:

In a secondary rack, a U-shaped support ing member having a base and apair of upstanding arms, a pair of cross rods mounted in said arms, aplurality of insulators mounted on one of said rods, and means rigidlyconnecting said rods at a point between said arms for reinforcing therod carrying said insulators, and means for locking said insulators inany desired position.

In testimony whereof, I have afliXed my signature to this specification.

WILLIAM P. BRADY.

